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Hi all, OK - I've stuffed up. my eeprom got erased during this process. I've done a recal except for the time interval fine. However my eeprom is pretty much blank now and doesn't have the header

[hp_agilent_equipment] wrote: Damn. I missed it too. But I bought my 8901B a very long time ago.

They are really very different. The 411A uses a traditional diode detector, that is supposedly linearized through the use of a matched feedback diode. The 3406A uses a fast sampler to convert the RF

[hp_agilent_equipment] wrote: I have two as well, good stuff. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

I'll make a third recommendation for Kirkby Microwave cal kits. I've purchased two of them, and the proof is in the verification tests. When my measurements closely match the supplied verification

I'm interested. I think I can get access to the a cal kit through work. 6GHz would be plenty since I don't have equipment that goes past 3GHz. Ed

I hope this won't be taken personally. But I think the OP is being done a disservice by being told he needs to buy something that he is clearly skilled enough to make himself. It was said is that

Thanks Vladan. Being audio types would make sense, since some of the windings have very large L, that is even out of range of my 4276A. They may also be inductors - one has only two terminals (out of

This is not 100% accurate, but most 9120- transformers were classified as "audio". Maybe it was used in an audio oscillator (vacuum tube). Vladan

I have some old HP canned transformers to ID - probably signal type - and I can't recall where they came from. Does anyone recognize these part numbers, and what they may have went to? They are

Hello all, I am completely new to oscilliscopes, and I just acquired one of these for free, since it was not working. Cool thing is that the technical manual is downloadable and the user manual as

Hi, It's not a simple job to measure a cal kit, most cal labs will not "calibrate" an unknown set of components. I second the recommendation for Kirby Microwave. Dave's kits are excellent and a much

Most people I know who repair their boatanchors have relied on the HP 410C. These are readily seen for sale with the RF probe and these have been converted to solid state. See

Can't you send a DIY cal kit to a calibration lab for measurement? I don't have a VNA yet, but that was what I was planning to do unless I manage to stumble across someone who will do it for me for

There was definitely a wave of these going cheap.? That seems to happen with a lot of stuff, 99.9% of which I miss when looking for something. Interesting that the 8901B takes 8480 series power

You can open the counter and check the different loops, are they locked or not? You may need the service manual for this. G?ran

Hi Calvin depending on your frequency range of interest, you can make your own cal kit. I made a SMA kit which works fine up to 6GHz, and a N kit which works to approx. 7GHz. However, to calibrate

Hi,Have you checked out the offerings from Kirkby Microwave Limited in the UK? David Kirkby is a member of this group and would be my go-to guy for this, he sure knows his stuff on VNA calibration! I

The 411A is the older, vacuum tube version of the 3406, vintage the same as the 400D/H/L AC and the 412 DC voltmeters. Jeremy N6WFO [hp_agilent_equipment] <hp_agilent_equipment@...>

[hp_agilent_equipment] wrote: I dunno man, I think you got really lucky. I've never seen them go cheap. -Dave -- Dave McGuire, AK4HZ New Kensington, PA